EP1092400A2 - Stent du colon - Google Patents

Stent du colon Download PDF

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Publication number
EP1092400A2
EP1092400A2 EP20000120055 EP00120055A EP1092400A2 EP 1092400 A2 EP1092400 A2 EP 1092400A2 EP 20000120055 EP20000120055 EP 20000120055 EP 00120055 A EP00120055 A EP 00120055A EP 1092400 A2 EP1092400 A2 EP 1092400A2
Authority
EP
European Patent Office
Prior art keywords
stent
stent according
hollow body
longitudinal direction
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20000120055
Other languages
German (de)
English (en)
Inventor
Georg Breucha
Lars Sunnanväder
Gerd Stumpp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maquet Cardiopulmonary GmbH
Original Assignee
Jostra Medizintechnik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jostra Medizintechnik AG filed Critical Jostra Medizintechnik AG
Publication of EP1092400A2 publication Critical patent/EP1092400A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts

Definitions

  • the present invention relates to a stent with a radial expandable and longitudinally open tubular hollow body for implantation in a hollow organ of the human body, especially in the intestine, especially in the rectum, sigma, Descending colon or transverse colon.
  • Endoprostheses are referred to as stents during treatment of stenoses in hollow organs are widely established.
  • Stents are used for pathological narrowing or external Pressure applied by tumors in hollow organs to their lumens to be kept open.
  • blood vessels have been the area of application, Esophagus, bile duct and urinary tract.
  • a stent is often implanted in the esophagus, of the esophagus in the area of the tumor for the Keeps passage of food open.
  • the stent is fixed by wedging the stent in the tumor tissue.
  • a stent known from EP 0 878 174 A2 is for implantation provided in coronary vessels and serves to expand them and keep it in the expanded state.
  • the stent is in an unexpanded state for this purpose Positioned the patient's body and subsequently, for example expanded through a balloon catheter.
  • This is possible, because the stent is in the form of a tubular metal body, whose wall has a web structure that several to each other has adjacent cells delimited by webs.
  • the individual stent areas can be expanded during expansion on a much larger outer diameter can be expanded.
  • stents in the colon has not previously been considered pulled because the colon colonizes more with germs is as e.g. the esophagus, so that an endoluminal pressure load the intestinal wall to circulatory disorders of the mucous membrane with consecutive infection.
  • the colon is convoluted and flexibly fixed and with a length of more than 150 cm stenoses, which a make flexible applicator necessary, the other requirement as an applicator for esophageal stents.
  • the present invention Based on the task of developing the stent mentioned at the outset in such a way that he is another with simple manufacturing possibility Application field finds.
  • This task is solved with the stent mentioned at the beginning by means of preferably releasable fixation of the stent inside in the hollow organ.
  • the inventor of the present application has recognized that that so far against the use of stents in the large intestine said that the stents did not injure the wall of the large intestine allowed to avoid the risk of ulceration, inflammation and Enter abscesses with risk of perforation.
  • Another Problem lies in the fact that foreign bodies form hypertrophic Pseudopolyps can lead.
  • the new stent can also be used in other hollow organs, where removability plays a minor or no role plays, but the new type of fixation is important.
  • the hollow body has a length of at most about 15 cm, preferably about 10 cm, and in the expanded Condition a minimum lumen diameter of at least approx. 10 mm, preferably about 12-26 mm.
  • the inventor of the present application has recognized that this dimensions not met by esophageal stents ideal for the conditions are adapted in the colon area.
  • the hollow body with such outer coating preferably made of silicone which is a penetration of tissue, preferably mucous membrane, prevented in the hollow body, the stent being further preferred on its outer peripheral surface as a means for releasable Fixation has projections when expanding with get inside the hollow body.
  • the projections which are also used for a releasable fixation care, may include elastic knobs, preferably made of silicone, further preferably the projections are elastic Rings or ring segments, also preferably made of silicone, include.
  • the stent is used as a detachable means Fixation on its outer peripheral surface at least in the expanded Condition approximately circumferential to the longitudinal direction
  • Has depression which is preferably approximately in the longitudinal direction is arranged in the center, the depression being further preferred is at least partially provided in the outer coating and the stent further preferably also the indentation has unexpanded state.
  • the formation of the depression or thickening can be by appropriate adjustment of those seen in the longitudinal direction Achieve elasticity and extensibility of the wall of the hollow body, so that when you expand the gain automatically / Forms or reinforces thickening.
  • This measure is technical particularly preferred, because it enables a cost-effective Production of the new stents e.g. through laser cut Bars and cells, their structure in the longitudinal direction like this the difference is that the stent differs in sections greatly expands, so that the thickening or Deepening arises. Additionally or alternatively, the deepening / thickening also at least partially in the outer coating be provided.
  • the spacers are elastic, preferably made of silicone are trained, the stent can be removed after a certain time remove from the intestine. Alternatively or additionally, the circumferential If the groove is inserted, there may be a spontaneous exit, if the stenosis is sufficiently dilated and the intestinal wall is more elastic has become.
  • the first area of application are stenosing colon tumors threatening intestinal obstruction in patients who either suffered Have a forecast or because of their poor general condition are inoperable.
  • the stent application saves an operation and prevents intestinal obstruction while preserving the intestinal clearing.
  • the permanent application of the stent makes sense here.
  • the second area of application of the new stents is pitted or inflammatory stenosis of the colon after surgery Interventions with colon resections and intestinal anastomoses or inflammatory colon diseases (diverticulitis).
  • Interventions with colon resections and intestinal anastomoses or inflammatory colon diseases (diverticulitis).
  • This is particularly so therefore advantageous because scarred stenoses even after multiple Dilatation the tendency to shrink again and Due to the application of the new stent is counteracted.
  • the applicator with a X-ray contrast strips.
  • a stent e.g. made of metal make spontaneous exits after relaxation of the stenosis wall or the autolysis of stents made of resorbable material alternative Opportunities.
  • a casing 10 is shown schematically in longitudinal section, the intestinal wall 11 for making an intestinal suture 12 after is turned inside.
  • a medical stent called a stent Steel or resorbable material used, which in Fig. 2 in schematic side view is shown.
  • This stent is 15 a tubular hollow body 16 which is open in the longitudinal direction 17 is. It has a preferred length L of 10 cm, a preferred one Outside diameter A of 28-31 mm and a preferred one Inner diameter I from 10-26 mm. At its open ends 18 the stent 15 has bead-like thickenings 19 through which damage to the inner wall of the intestine is avoided.
  • a circumferential depression 21 In its outer peripheral surface 20 is a circumferential depression 21 provided, the width 22 about 10 mm and the depth 23 is approximately 3-4 mm, so that the stent 15 in its wall 24 has a kind of throat, which from the dimensions to the Gut seam 12 is adjusted.
  • the stent 15 can either be removed as planned or leave spontaneously.
  • stent 15 of FIG. 3 can also be useful to outer peripheral surface 20 of the stent 15 a circumferential thickening 25, as shown in Fig. 3.
  • stent 15 of FIG. 3 on its outer peripheral surface 20 still elastic projections, preferably made of silicone are made.
  • the projections can be elastic knobs 26 or but be elastic rings or ring segments. They make sure that between the intestinal wall 11 and the stent 15 a gap 27 for Secretion drain remains.
  • this has a smooth outer skin that - As shown in Fig. 4 - preferably by a coating 32 can be realized from silicone. Alternatively it is also possible to make the outer peripheral surface immediately smooth.
  • Fig. 4 it can be seen that there is a circumferential recess 31 is provided for temporary fixation of the stent 15 at the intestinal suture 12 provides.
  • ring segments 33 are provided in FIG. 4 as spacers act and the gap already known from Fig. 3 Release 27 to the intestinal wall 12 for secretion drainage.
  • the new stent 15 has the recess 21, 31 or thickening 25 expanded on the one hand in his shown in Figures 2 to 4 State on what e.g. can be achieved in that the elasticity and extensibility of the stent in the longitudinal direction 17 is so different that recess 21, 31 or Only form thickening 25 when expanding. This will do so achieved the webs and cells used in manufacturing of the stent arise, a correspondingly different structure to have.
  • the stent is manufactured its wall 24 by chemical or mechanical methods such to prepare that a circumferential recess 21, 31 or Thickening 25 arises, which is retained when expanding.

Landscapes

  • Health & Medical Sciences (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Pulmonology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
EP20000120055 1999-10-13 2000-09-15 Stent du colon Withdrawn EP1092400A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999149334 DE19949334A1 (de) 1999-10-13 1999-10-13 Dickdarm-Stent
DE19949334 1999-10-13

Publications (1)

Publication Number Publication Date
EP1092400A2 true EP1092400A2 (fr) 2001-04-18

Family

ID=7925482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000120055 Withdrawn EP1092400A2 (fr) 1999-10-13 2000-09-15 Stent du colon

Country Status (2)

Country Link
EP (1) EP1092400A2 (fr)
DE (1) DE19949334A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1021328C2 (nl) * 2002-08-26 2004-03-01 Doorzand Trocar Protector B V Inrichting en werkwijze voor het afdekken van een darmwanddeel.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327231B3 (de) 2003-06-13 2005-02-17 Universitätsklinikum Freiburg Saugstent
DE102005016103B4 (de) * 2005-04-08 2014-10-09 Merit Medical Systems, Inc. Duodenumstent
DE102005019649A1 (de) 2005-04-26 2006-11-02 Alveolus Inc. Knickfester Stent

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878174A2 (fr) 1997-05-15 1998-11-18 Jomed Implantate GmbH Extenseur coronaire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878174A2 (fr) 1997-05-15 1998-11-18 Jomed Implantate GmbH Extenseur coronaire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1021328C2 (nl) * 2002-08-26 2004-03-01 Doorzand Trocar Protector B V Inrichting en werkwijze voor het afdekken van een darmwanddeel.

Also Published As

Publication number Publication date
DE19949334A1 (de) 2001-05-23

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